subselect.test

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

insert into t1 values (0, 10),(1, 11),(2, 12);
insert into t2 values (1, 21),(2, 22),(3, 23);
select * from t1;
-- error 1093
update t1 set b= (select b from t1);
-- error 1242
update t1 set b= (select b from t2);
update t1 set b= (select b from t2 where t1.a = t2.a);
select * from t1;
drop table t1, t2;

#delete with subselects
create table t1 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t1 values (0, 10),(1, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t1;
select * from t1 where b = (select b from t2 where t1.a = t2.a);
-- error 1093
delete from t1 where b = (select b from t1);
-- error 1242
delete from t1 where b = (select b from t2);
delete from t1 where b = (select b from t2 where t1.a = t2.a);
select * from t1;
drop table t1, t2;

#multi-delete with subselects

create table t11 (a int NOT NULL, b int, primary key (a));
create table t12 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t11 values (0, 10),(1, 11),(2, 12);
insert into t12 values (33, 10),(22, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t11;
select * from t12;
-- error 1093
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t12 where t11.a = t12.a);
-- error 1242
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2);
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2 where t11.a = t2.a);
select * from t11;
select * from t12;
drop table t11, t12, t2;

#insert with subselects
CREATE TABLE t1 (x int);
create table t2 (a int);
create table t3 (b int);
insert into t2 values (1);
insert into t3 values (1),(2);
-- error 1093
INSERT INTO t1 (x) VALUES ((SELECT x FROM t1));
-- error 1242
INSERT INTO t1 (x) VALUES ((SELECT b FROM t3));
INSERT INTO t1 (x) VALUES ((SELECT a FROM t2));
select * from t1;
insert into t2 values (1);
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
-- sleep 1
select * from t1;
INSERT INTO t1 (x) select (SELECT SUM(a)+1 FROM t2) FROM t2;
select * from t1;
# After this, only data based on old t1 records should have been added.
INSERT INTO t1 (x) select (SELECT SUM(x)+2 FROM t1) FROM t2;
select * from t1;
-- error 1054
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(x) FROM t2));
INSERT DELAYED INTO t1 (x) VALUES ((SELECT SUM(a) FROM t2));
-- sleep 1
select * from t1;
#
#TODO: should be uncommented after bug 380 fix pushed
#INSERT INTO t1 (x) SELECT (SELECT SUM(a)+b FROM t2) from t3;
#select * from t1;
drop table t1, t2, t3;

#replace with subselects
CREATE TABLE t1 (x int not null, y int, primary key (x));
create table t2 (a int);
create table t3 (a int);
insert into t2 values (1);
insert into t3 values (1),(2);
select * from t1;
-- error 1093
replace into t1 (x, y) VALUES ((SELECT x FROM t1), (SELECT a+1 FROM t2));
-- error 1242
replace into t1 (x, y) VALUES ((SELECT a FROM t3), (SELECT a+1 FROM t2));
replace into t1 (x, y) VALUES ((SELECT a FROM t2), (SELECT a+1 FROM t2));
select * from t1;
replace into t1 (x, y) VALUES ((SELECT a FROM t2), (SELECT a+2 FROM t2));
select * from t1;
replace DELAYED into t1 (x, y) VALUES ((SELECT a+3 FROM t2), (SELECT a FROM t2));
-- sleep 1
select * from t1;
replace DELAYED into t1 (x, y) VALUES ((SELECT a+3 FROM t2), (SELECT a+1 FROM t2));
-- sleep 1
select * from t1;
replace LOW_PRIORITY into t1 (x, y) VALUES ((SELECT a+1 FROM t2), (SELECT a FROM t2));
select * from t1;
drop table t1, t2, t3;

-- error 1096
SELECT * FROM (SELECT 1) b WHERE 1 IN (SELECT *);

CREATE TABLE t2 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t2 VALUES (1),(2);
SELECT * FROM t2 WHERE id IN (SELECT 1);
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1);
SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1+(select 1));
EXPLAIN EXTENDED SELECT * FROM t2 WHERE id IN (SELECT 1 UNION SELECT 3);
SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 3);
SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 2);
-- error 1093
INSERT INTO t2 VALUES ((SELECT * FROM t2));
-- error 1093
INSERT INTO t2 VALUES ((SELECT id FROM t2));
SELECT * FROM t2;
CREATE TABLE t1 (id int(11) default NULL, KEY id (id)) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 values (1),(1);
-- error 1242
UPDATE t2 SET id=(SELECT * FROM t1);
drop table t2, t1;

#NULL test
create table t1 (a int);
insert into t1 values (1),(2),(3);
select 1 IN (SELECT * from t1);
select 10 IN (SELECT * from t1);
select NULL IN (SELECT * from t1);
update t1 set a=NULL where a=2;
select 1 IN (SELECT * from t1);
select 3 IN (SELECT * from t1);
select 10 IN (SELECT * from t1);
select 1 > ALL (SELECT * from t1);
select 10 > ALL (SELECT * from t1);
select 1 > ANY (SELECT * from t1);
select 10 > ANY (SELECT * from t1);
drop table t1;
create table t1 (a varchar(20));
insert into t1 values ('A'),('BC'),('DEF');
select 'A' IN (SELECT * from t1);
select 'XYZS' IN (SELECT * from t1);
select NULL IN (SELECT * from t1);
update t1 set a=NULL where a='BC';
select 'A' IN (SELECT * from t1);
select 'DEF' IN (SELECT * from t1);
select 'XYZS' IN (SELECT * from t1);
select 'A' > ALL (SELECT * from t1);
select 'XYZS' > ALL (SELECT * from t1);
select 'A' > ANY (SELECT * from t1);
select 'XYZS' > ANY (SELECT * from t1);
drop table t1;
create table t1 (a float);
insert into t1 values (1.5),(2.5),(3.5);
select 1.5 IN (SELECT * from t1);
select 10.5 IN (SELECT * from t1);
select NULL IN (SELECT * from t1);
update t1 set a=NULL where a=2.5;
select 1.5 IN (SELECT * from t1);
select 3.5 IN (SELECT * from t1);
select 10.5 IN (SELECT * from t1);
select 1.5 > ALL (SELECT * from t1);
select 10.5 > ALL (SELECT * from t1);
select 1.5 > ANY (SELECT * from t1);
select 10.5 > ANY (SELECT * from t1);
explain extended select (select a+1) from t1;
select (select a+1) from t1;
drop table t1;

#
# Null with keys
#

CREATE TABLE t1 (a int(11) NOT NULL default '0', PRIMARY KEY  (a));
CREATE TABLE t2 (a int(11) default '0', INDEX (a));
INSERT INTO t1 VALUES (1),(2),(3),(4);
INSERT INTO t2 VALUES (1),(2),(3);
SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
explain extended SELECT t1.a, t1.a in (select t2.a from t2) FROM t1;
CREATE TABLE t3 (a int(11) default '0');
INSERT INTO t3 VALUES (1),(2),(3);
SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
drop table t1,t2,t3;

#LIMIT is not supported now
create table t1 (a float);
-- error 1235
select 10.5 IN (SELECT * from t1 LIMIT 1);
-- error 1235
select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
drop table t1;

create table t1 (a int, b int, c varchar(10));
create table t2 (a int);
insert into t1 values (1,2,'a'),(2,3,'b'),(3,4,'c');
insert into t2 values (1),(2),(NULL);
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,2,'a'),(select c from t1 where a=t2.a)  from t2;
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,3,'b'),(select c from t1 where a=t2.a) from t2;
select a, (select a,b,c from t1 where t1.a=t2.a) = ROW(a,4,'c'),(select c from t1 where a=t2.a) from t2;
drop table t1,t2;

create table t1 (a int, b real, c varchar(10));
insert into t1 values (1, 1, 'a'), (2,2,'b'), (NULL, 2, 'b');
select ROW(1, 1, 'a') IN (select a,b,c from t1);
select ROW(1, 2, 'a') IN (select a,b,c from t1);
select ROW(1, 1, 'a') IN (select b,a,c from t1);
select ROW(1, 1, 'a') IN (select a,b,c from t1 where a is not null);
select ROW(1, 2, 'a') IN (select a,b,c from t1 where a is not null);
select ROW(1, 1, 'a') IN (select b,a,c from t1 where a is not null);
select ROW(1, 1, 'a') IN (select a,b,c from t1 where c='b' or c='a');
select ROW(1, 2, 'a') IN (select a,b,c from t1 where c='b' or c='a');
select ROW(1, 1, 'a') IN (select b,a,c from t1 where c='b' or c='a');
-- error 1235
select ROW(1, 1, 'a') IN (select b,a,c from t1 limit 2);
drop table t1;

#
# DO & SET
#
create table t1 (a int);
insert into t1 values (1);
do @a:=(SELECT a from t1);
select @a;
set @a:=2;
set @a:=(SELECT a from t1);
select @a;
drop table t1;
-- error 1146
do (SELECT a from t1);
-- error 1146
set @a:=(SELECT a from t1);

CREATE TABLE t1 (a int, KEY(a)); 
HANDLER t1 OPEN;
-- error 1064
HANDLER t1 READ a=((SELECT 1));
HANDLER t1 CLOSE;
drop table t1;

create table t1 (a int);
create table t2 (b int);
insert into t1 values (1),(2);
insert into t2 values (1);
select a from t1 where a in (select a from t1 where a in (select b from t2));
drop table t1, t2;

create table t1 (a int, b int);
create table t2 like t1;
insert into t1 values (1,2),(1,3),(1,4),(1,5);
insert into t2 values (1,2),(1,3);
select * from t1 where row(a,b) in (select a,b from t2);
drop table t1, t2;

CREATE TABLE `t1` (`i` int(11) NOT NULL default '0',PRIMARY KEY  (`i`)) ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES (1);
UPDATE t1 SET i=i+1 WHERE i=(SELECT MAX(i));
select * from t1;
drop table t1;

#test of uncacheable subqueries
CREATE TABLE t1 (a int(1));
EXPLAIN EXTENDED SELECT (SELECT RAND() FROM t1) FROM t1;
EXPLAIN EXTENDED SELECT (SELECT ENCRYPT('test') FROM t1) FROM t1;
EXPLAIN EXTENDED SELECT (SELECT BENCHMARK(1,1) FROM t1) FROM t1;
drop table t1;


CREATE TABLE `t1` (
  `mot` varchar(30) character set latin1 NOT NULL default '',
  `topic` mediumint(8) unsigned NOT NULL default '0',
  `date` date NOT NULL default '0000-00-00',
  `pseudo` varchar(35) character set latin1 NOT NULL default '',
  PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`),
  KEY `pseudo` (`pseudo`,`date`,`topic`),
  KEY `topic` (`topic`)
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;

CREATE TABLE `t2` (
  `mot` varchar(30) character set latin1 NOT NULL default '',
  `topic` mediumint(8) unsigned NOT NULL default '0',
  `date` date NOT NULL default '0000-00-00',
  `pseudo` varchar(35) character set latin1 NOT NULL default '',
  PRIMARY KEY  (`mot`,`pseudo`,`date`,`topic`),
  KEY `pseudo` (`pseudo`,`date`,`topic`),
  KEY `topic` (`topic`)
) ENGINE=MyISAM CHARSET=latin1 ROW_FORMAT=DYNAMIC;